Why is Betelgeuse is the coolest star?

What is the best shape for a rocket? Star or planet next to the moon? Why is volterra's clock tower so important? What kind of star is of peguesus markab? Which area of science would include the study of the barometric pressure of the atmosphere above Florida? Who is theafrican American invented the light bulb? Is there a Bible verse that references gravity? Are Most robots are working in space? How high did the first hot air balloon go? How long does it take for the sun to go down each day? How much would you weigh on a nebula? What are the months of the year in order starting with January? What happened about 4.6 billion years ago? What was the sport played on the moon? What causes the phenomenon of a moon with a halo around it? What species first appeared to walk up right? Is time related to the orbit of earth? What part of speech is the word orbit? How many days would it take a space shuttle to travel from earth to the planet uranus? What was the first artificial object to orbit the earth?